Perhaps the most significant feature that makes users search for is its ability to create Universal Images . Traditionally, a Windows image was tied to the specific hardware it was installed on. ES3 automates the process of "generalizing" the image so thoroughly that an image captured on a Dell OptiPlex can be deployed to an HP EliteBook without blue-screening. It handles the HAL (Hardware Abstraction Layer) complexities that often plague manual sysprep attempts.